high speed sync ques
- Thread starter GURCH
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- Pat MacInnes
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Probably a recycling issue. Are the batteries fresh?
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- Pat MacInnes
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It could be that you're trying to pump too much power in quick succession.
Photodiva
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- Carol
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I wonder if you have misinterpreted high speed sync?
A camera's maximum sync speed is the fastest shutter speed at which you can use a "standard" flash. (I say "standard" because some*systems now offer a "high speed sync" mode that allows you to use flash at any shutter speed. It doesnt mean rapid fire contnuous flash firing.
A camera's maximum sync speed is the fastest shutter speed at which you can use a "standard" flash. (I say "standard" because some*systems now offer a "high speed sync" mode that allows you to use flash at any shutter speed. It doesnt mean rapid fire contnuous flash firing.
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- David Williams
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To sync above 1/200th of a second the flash fires at some fantastic rate, thousands of Hz if I remember, this uses lots of power and the flash's capability to take continual shots is greatly reduced.
http://learn.usa.canon.com/resources/articles/2011/speedlite_tip_pt2_article.shtml#page7
David
http://learn.usa.canon.com/resources/articles/2011/speedlite_tip_pt2_article.shtml#page7
David
Canon Bob
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- Bob
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I'll take a guess that you're using ETTL and not manual settings on the flash. In ETTL, the flash needs to be fully charged for each shot and the time taken to reach this will be dependant on the amount of power used for the previous shot. So, if the previous shot only required a small amount of power then the flash will be ready more quickly when compared to a more draining scenario.
To give your flash the best chance you need to use a wider aperture or higher Iso (giving a faster shutter speed) and shorter series of HSS pulses.
Alternatively you can use the flash in manual and then it will only need to attain the power level that you've selected before firing.
Hope that made sense.
Bob
To give your flash the best chance you need to use a wider aperture or higher Iso (giving a faster shutter speed) and shorter series of HSS pulses.
Alternatively you can use the flash in manual and then it will only need to attain the power level that you've selected before firing.
Hope that made sense.
Bob
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- Richard
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HSS is inherenty wasteful of flash power, so that is almost certainly your problem. As stated above, flash is probably close to flat out.
Also note Carol's post. Why do you need HSS? Usually because the ambient light is forcing the shutter speed above the normal max x-sync speed, such as fill-in flash in bright sun. If you don't need that, or can work it with lower ISO or higher f/numbner to keep the shutter speed below 1/200sec, you will get much more effective power from the gun.
Also note Carol's post. Why do you need HSS? Usually because the ambient light is forcing the shutter speed above the normal max x-sync speed, such as fill-in flash in bright sun. If you don't need that, or can work it with lower ISO or higher f/numbner to keep the shutter speed below 1/200sec, you will get much more effective power from the gun.